Problem using a list with piechart

[dennisbf]

Hi guys, i'm having some trouble to create a piechart from a list

primefaces version 3.0.M3
tomcat version 7.0

this is the error i'm getting

Sep 20, 2011 6:33:59 PM com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/restrito/acao.xhtml]
java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.primefaces.model.chart.PieChartModel

this is where i call the list

<ui:composition>
	<h:panelGrid width="100%">
		<h:form id="graficosCarteira">
			<h:panelGrid columns="2" width="100%">
				<p:panel header="Composição carteira em % de quantidade"
					toggleable="true" toggleSpeed="500">
					<p:pieChart value="#{acaoBean.lista}" var="acaoVirtual"
						categoryField="#{acaoVirtual.acao.sigla}"
						dataField="#{acaoVirtual.acao.quantidade}" width="265px"
						height="125px" style="estiloGrafico" />
				</p:panel>
				<p:panel header="Composição carteira em % de valor"
					toggleable="true" toggleSpeed="500" style="margin-left:+10px;">
					<p:pieChart value="#{acaoBean.lista}" var="acaoVirtual"
						categoryField="#{acaoVirtual.acao.sigla}"
						dataField="#{acaoVirtual.total}" width="265px" height="125px"
						style="estiloGrafico" />
				</p:panel>
			</h:panelGrid>
		</h:form>
	</h:panelGrid>
</ui:composition>

and this is the list

public List<AcaoVirtual> getLista() {  
        FacesContext context = FacesContext.getCurrentInstance();  
        ContextoBean contextoBean = ContextoUtil.getContextoBean();  
        AcaoRN acaoRN = new AcaoRN();  
        try {  
            if (this.lista == null) {  
                this.lista = acaoRN.listarAcaoVirtual(contextoBean.getUsuarioLogado());  
            }  
        } catch (RNException e) {  
            context.addMessage(null, new FacesMessage(e.getMessage()));  
        }  
        return this.lista;  
    }

Can anyone tell me what i'm doing wrong?

the AcaoVirtual is here:

public class AcaoVirtual {

	private Acao	acao	= new Acao();
	private float	ultimoPreco;
	private float	total;

	public Acao getAcao() {
		return acao;
	}

	public void setAcao(Acao acao) {
		this.acao = acao;
	}

	public float getUltimoPreco() {
		return ultimoPreco;
	}

	public void setUltimoPreco(float ultimoPreco) {
		this.ultimoPreco = ultimoPreco;
	}

	public float getTotal() {
		return total;
	}

	public void setTotal(float total) {
		this.total = total;
	}
}

Thank you very much.

[Norm]

java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.primefaces.model.chart.PieChartModel

Where do you cast anything to a PieChartModel?

[dennisbf]

Where do you cast anything to a PieChartModel?

H, Norm, thanks for you reply


i think he's considering this

 <p:pieChart value="#{acaoBean.lista}"

as a cast, because, "lista" comes from a List, i don't really cast it.
That's why i just don't understand this error.

Thank you very much.

[Norm]

Sorry, I'm restricted to java code only. That doesn't look like java.

[dennisbf]

Hi, Norm, thanks again for the reply

the method who is been called from de JSF (Java Sever Faces) and using the Primefaces Framework, is in the 1st post i made as you can see

public List<AcaoVirtual> getLista() {  
        FacesContext context = FacesContext.getCurrentInstance();  
        ContextoBean contextoBean = ContextoUtil.getContextoBean();  
        AcaoRN acaoRN = new AcaoRN();  
        try {  
            if (this.lista == null) {  
                this.lista = acaoRN.listarAcaoVirtual(contextoBean.getUsuarioLogado());  
            }  
        } catch (RNException e) {  
            context.addMessage(null, new FacesMessage(e.getMessage()));  
        }  
        return this.lista;  
    }

and as you can see, there no casts

Thank you.

[Norm]

I still don't see the java code where a variable is cast to a PieChartModel.
Is there generated source code where that happens?

[dennisbf]

hi, Norm, thanks again.
I'm not sure if i get it.
In any moment a made a cast to piechart, the only place i'm using it, is in the JSF, with the tag i posted

my variables from my class AcaoBean are these ones:

	private AcaoVirtual			selecionada		= new AcaoVirtual();
	private List<AcaoVirtual>	lista				= null;
	private String					linkCodigoAcao	= null;

thank you very much

and this is my jsf where a create de pieChart

<ui:composition>
	<h:panelGrid width="100%">
		<h:form id="graficosCarteira">
			<h:panelGrid columns="2" width="100%">
				<p:panel header="Composição carteira em % de quantidade"
					toggleable="true" toggleSpeed="500">
					<p:pieChart value="#{acaoBean.lista}" var="acaoVirtual"
						categoryField="#{acaoVirtual.acao.sigla}"
						dataField="#{acaoVirtual.acao.quantidade}" width="265px"
						height="125px" style="estiloGrafico" />
				</p:panel>
				<p:panel header="Composição carteira em % de valor"
					toggleable="true" toggleSpeed="500" style="margin-left:+10px;">
					<p:pieChart value="#{acaoBean.lista}" var="acaoVirtual"
						categoryField="#{acaoVirtual.acao.sigla}"
						dataField="#{acaoVirtual.total}" width="265px" height="125px"
						style="estiloGrafico" />
				</p:panel>
			</h:panelGrid>
		</h:form>
	</h:panelGrid>
</ui:composition>

[Norm]

Does the jsf "code" generate java code that is compiled?
Otherwise where is the "cast" being done?

[dennisbf]

hi, norm
There is no cast, the JSF is just the view

if i leave the piegraph part on JSF commented, the page opens, if i don't i get this error

[Norm]

What happens to this code:

<ui:composition>
	<h:panelGrid width="100%">
		<h:form id="graficosCarteira">
			<h:panelGrid columns="2" width="100%">
				<p:panel header="Composição carteira em % de quantidade"
					toggleable="true" toggleSpeed="500">
					<p:pieChart value="#{acaoBean.lista}" var="acaoVirtual"
						categoryField="#{acaoVirtual.acao.sigla}"
						dataField="#{acaoVirtual.acao.quantidade}" width="265px"
						height="125px" style="estiloGrafico" />
				</p:panel>
				<p:panel header="Composição carteira em % de valor"
					toggleable="true" toggleSpeed="500" style="margin-left:+10px;">
					<p:pieChart value="#{acaoBean.lista}" var="acaoVirtual"
						categoryField="#{acaoVirtual.acao.sigla}"
						dataField="#{acaoVirtual.total}" width="265px" height="125px"
						style="estiloGrafico" />
				</p:panel>
			</h:panelGrid>
		</h:form>
	</h:panelGrid>

It's not java. Is it converted to java source and compiled?
What program does anything with the above code? What does it do with it?

[dennisbf]

Hi, Norm
This is a part of a Stock page, whre you can see your Stock (from the graph that is not loading), you can add new Stocks, and you have a graph from YahooUtil.
this jsf is called here, wich is the main page for stocks

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
	xmlns:h="http://java.sun.com/jsf/html"
	xmlns:ui="http://java.sun.com/jsf/facelets">
<ui:composition template="/templates/interna.xhtml">
	<ui:define name="titulo">
    Cadastro de Ações
	</ui:define>

	<ui:define name="corpo">
		<h:outputScript target="head">
		var estiloGrafico = {
			padding :20,
			legend : {
				display :"right",
				spacing :10
			}
		};
		</h:outputScript>

		<ui:include src="acao_graficoscarteira.xhtml" />
		<br />
		<ui:include src="acao_edicao.xhtml" />
		<br />
		<ui:include src="acao_listagem.xhtml" />
		<br />
		<ui:include src="acao_graficos.xhtml" />
	</ui:define>
</ui:composition>
</html>

it is converted

[Norm]

None of that can execute. There is a program that reads it and does ????

[dennisbf]

It is a website actually
And the graph suposed to open when you call the page
"localhost:8080/FinanceiroWeb/restrito/acao.jsf"

but, as the page load the graph, i'm getting this error.

[Norm]

It doesn't matter where the file is, there is a program that reads it and does something with it.

[dennisbf]

like the tomcat?
hibernate?